<template>
  <div class="app-container">
    <el-button type="text" @click="dialogChapterFormVisible = true">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chanpterList">
      <li
        v-for="chapter in chapterVideoList"
        :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
 <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
 <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
 <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
 </span>
        </p>
        <!-- 视频 -->
        <ul class="chanpterList videoList">
          <li
            v-for="video in chapter.children"
            :key="video.id">
            <p>{{ video.title }}
              <span class="acts">
 <el-button type="text">编辑</el-button>
 <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
 </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>
    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <!-- TODO -->

        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary"
                   @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>


  </div>
</template>
<script>
import chapter from "../../../api/teacher/chapter";
import video from "../../../api/teacher/video";
export default {
  data() {
    return {
      saveBtnDisabled: false, // 保存按钮是否禁用
      chapterVideoList:[],
      courseId:'',
      dialogChapterFormVisible:false,
      dialogVideoFormVisible: false, // 是否显示课时表单
      chapter:{
        // 封装章节数据
        title:'',
        sort:0
      },
      video: {// 课时对象
        title: '',
        sort: 0,
        free: 0,
        videoSourceId: ''
      },
    }
  },
  created() {
    // 获取路由中的id值
     if(this.$route.params && this.$route.params.id){
       this.courseId = this.$route.params.id;
       this.getChapterVideo();
     }
  },
  methods: {
    openVideo(id){
      this.dialogVideoFormVisible = true;
      // 章节id
      this.video.chapterId = id;
      // 课程id
      this.video.courseId = this.courseId;
    },
    //=================================小节操作==================================
    //删除小节
    removeVideo(id){
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        return video.deleteVideo(id)
      }).then(() => {
        this.getChapterVideo()// 刷新列表
        this.$message({
          type: 'success',
          message: '删除小节成功!'
        })
      }).catch((response) => { // 失败
        if (response === 'cancel') {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        } else {
          this.$message({
            type: 'error',
            message: response.message
          })
        }
      })
    },

    addVideo(id){
      this.dialogVideoFormVisible = false;

      video.addVideo(this.video).then(response => {
        this.$message({
          type: 'success',
          message: '保存成功!'
        })
        // 刷新页面
        this.getChapterVideo();
      })
    },

    saveOrUpdateVideo(){
      this.addVideo();
    },



    //=================================章节操作==================================
    removeChapter(chapterId) {
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        return chapter.deleteChapter(chapterId)
      }).then(() => {
        this.getChapterVideo()// 刷新列表
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
      }).catch((response) => { // 失败
        if (response === 'cancel') {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        } else {
          this.$message({
            type: 'error',
            message: response.message
          })
        }
      })
    },
    // 数据回显
    openEditChapter(id){
        chapter.getChapter(id).then(response =>{
          //打开弹框
          this.dialogChapterFormVisible=true;
          // 数据回显
          this.chapter = response.data.chapter
        })
    },

    addChapter() {
      if(this.$route.params && this.$route.params.id){
        this.courseId = this.$route.params.id;
      }
      chapter.addChapter(this.chapter,this.courseId ).then(response =>{
        //关闭弹框
        this.dialogChapterFormVisible=false;
        // 提示信息
        this.$message({
          type:'success',
          message:'添加章节成功！'
        })
        // 清空chapter
        this.chapter.title='';
        // 刷新页面
        this.getChapterVideo()

      })
    },

    // 修改章节
    updateChapter(){
         chapter.updateChapter(this.chapter).then(response =>{
           //关闭弹框
           this.dialogChapterFormVisible=false;
           // 提示信息
           this.$message({
             type:'success',
             message:'修改章节成功！'
           })
           // 清空chapter
           this.chapter.title='';
           // 刷新页面
           this.getChapterVideo()
         })
    },

    saveOrUpdate(){
      if(!this.chapter.id){
        this.addChapter();
      }else{
        this.updateChapter();
      }


    },


    // 根据课程id查询章节和小结
    getChapterVideo(){
       chapter.getAllChapterVideo(this.courseId)
      .then(response=>{
          this.chapterVideoList = response.data.allChapterVideo
      })
},

    // 上一步
    previous() {
      console.log('previous')
      this.$router.push({ path: '/edu/course/info/'+this.courseId })
    },
    next() {
      console.log('next')
      this.$router.push({ path: '/edu/course/publish/'+this.courseId  })
    }
  }
}
</script>
<style scoped>
.chanpterList{
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}
.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}
</style>
